Mold silica gel method of operation
1. Mold processing mold Silicone and curing agent Stirring uniform silicone rubber mold production methods, and precautions Silicone rubber mold production methods and precautions. Mold silica gel appearance is the flow of liquid, A component is silica gel, B component is curing agent, for example, take 100 grams of silica gel, add 2 grams of curing agent (Note: silica gel and curing agent must be stirred even if there is no mixing evenly, Mold will appear curing dry uneven situation, and the impact of silicone mold life, and the number of mold, and even cause mold scrapped.
2. Vacuum exhaust bubble treatment. Silica gel and curing agent after mixing evenly, the vacuum exhaust bubble section. Vacuum time should not be too long, generally not more than 10 minutes, otherwise, silica gel curing cross-linking reaction, can not be painted or perfusion, resulting in material waste.
3. Brush the operation process. (In the brush or perfusion before the mother mold on the release agent or release agent), the brush must be uniform, 30 minutes after a layer of sticky Sand cloth or glass fiber cloth to increase the strength and tension of the mold; and then a second brushing, and then paste a layer of gauze or fiberglass cloth, and then silica gel brushing, after this treatment out of the mold with life and mold The number of times, long life, cost savings, improve the effectiveness of silicone rubber mold production methods and precautions Article silicone rubber mold production methods and precautions from the Australian-precision molds! The
4. The production of external mold. The general method is: the mold around the plastic board or wood surrounded by a kind of gypsum will be filled with mold can be used, another external mold is the way to use resin brushing, brushing a layer of resin, coated Brush a layer of glass fiber cloth, and then brushing and then paste, repeated two or three layers can be completed outside the mold. 5. Silicone (silicone, silicone) and curing agent ratio reflects the situation. Proposed curing agent can not add more than 5%, the greater the proportion of curing agent, the faster curing time, the more brittle mold, short life. But also according to product and process requirements, the appropriate amount of silicone oil, mold making better, pay attention to silicone oil should not be excessive (5% -10%), otherwise, affect the silicone mold tensile strength and hardness.